Friction-gear casing



'L F. OCQNNGR. FRXCTON GEAR CASINGl APPLICATH FILED SEPT 15,91.f.

5y y y CLLNGIS, ASSIG-NGR T0 WILLEAM E. WIENER, 0F

.remi r. operaron, cnicas-o,

Speciicaton of Letters Iiatent.

Patented Mar. 29, ilil.

Applicatione September 15, 1MB. Serial No. 323,789.

To @ZZ 'whom it 'may concer/vt.

Be it known that I, .lonn- F. OCoNNon, a K citizen of the United States, residing at Chicago, in the county of Coeli and State oflllinois, haveinvented a certain new and useful llniprovement in FrictionGear Casings,of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part ofvthis specification. This invention relates to improvements in friction gear casing.

In the art of railway draft rivgings, it

. U is well known thiat vthe parte of friction gears which wear most rapidly those subject to the friction between ine-ving elements and particularly that part lniown as the friction shell. V7 hen thefriction shell becomes unduly worn, it is necessary to re place the saine and where the shell is formed as-an integral component part of the usual spring cage, the cost of renewal is rendered excessive. course heretofore been made to provide friction shells whichv are separable or detachable without destructive effect," from the usual spring cage, some of these devices necessitating the use of bolts, keys or other extraneous elements to eect the connection between the shell and the spring cage. @ther efforts have been made to provide a detachable connection between the shell and cage wherein the connecting means are formed integral ywith the shell and cage. The latter arrangement has been found pret erable to the other type since it obviates the use of eXtra parts and a stronger connection is obtained as a general rule. Heretofore, however, where a detachable connection has been attempted between the friction shell and the spring cage, by means integral with the shell and cage, it has been found necessary tov laterally or vertically eX- tend the connecting parts so as to occupy a space greater than that occupied by the shell or cage itself where the latter are formed integral.

The object of my invention is to provide a friction gear casing which is comprised of a friction shell and spring cage detachably connected by means integral with the cage Yand shell and so designed that the over-all width and height of the improved casing, even at the point of detachable connection,

Many attempts have, of

4is not enlarged above the over-all width and height of a corresponding friction gear casing wherein the shell. and cage are made integral.

Another object of the invention is to provide a detachable friction shell and spring cage having the connecting elements formed integral tllerewith and which is suitable for interchange with friction. gear casings now y in actual service in which the shell and cage are formed integral and without the necessity of changing or rearranging any of the attachments of the draft rigging.

l ln the drawings forming a part of this specification, Figure l is a side elevation of a friction gear casing showing my im proveniente in connection therewith. Fig. 2 is a vertical sectionalview taken on the line .2--2 of F ig. l. Fig. 3 is an elevational view of the inner end of the friction shell proper. And Fig. i is a corresponding elevational view. of the coperating outer end of the spring cage.

ln said drawing, 'the friction shell proper is designated by the reference A and the spring cage by the reference B. As customary in this well known type of friction gear, the inner friction surface of the shell A is made cylindrical as indicated at 10 andu the interior of the cage B is of corresponding cylindrical form as indicated at ll to accommodate the usual double coil spring. ln this type of friction gear, as is customary, the rear end of the spring cage B is formed withl a rectangular and substantially square wall indicated at l2 which acts as a rear follower. lnactual practice, the rear follower l2 is approximately nine inches high and the same inl width so that the device is suitable for use in conjunction with lso-called nine-inch yolres. As is also customary, both. the shell and the cage are provided on their upper and lower portions with additional metal as indicated at 13 in Fig. 3 and l-l in Fig. 4, thereby providing wide flat surfaces adjacent and coperable with the upper and lower arms of the yoke.

To effect the detachable connection between the shell and cage by means formed integral on the shell and cage, l employ the following arrangement. T he shell is provided at its inner end with a flange section indicated by the reference 15 in F ig. 3 and the cage E is formed with a correspondingf y all dimension. r for instance the liange 15 of the shell A,

flange section 16. These flange sections 15 and 16 are made substantially cci-extensive with the rear follower 12 and in any event so as not to provide a larger area or over- On one of thesel flanges, as

l provide a diagonally extending T-shaped rib 17, the same being of course interrupted or omitted at its central portion in accordance with the cylindrical interior of the friction shell. 0n the tivo diagonally disposed corners on opposite sides of the T- shaped rib or tongue 17, 1 provide under-cut diagonally extending flanges 18-18, it being understood that the flanges 18 and tongue .17 extend parallel. @n the other part of' the friction gear casing, the cage B', l provide on the outer face of the square flange 16, a diagonally extending under-cut 'lshaped groove 19 to accommodate the tongue 17. Similarly on the diagonally disposed corners on opposite sides of the groove 19, I cut away the main vfia-nge 16 so asto l leave under-cut diagonally extending flanges 2O which cooperate with" the under-cut flanges 18 of the shell. As'will be apparent, the two parts are assembled by sliding the one diagonally of the other with the tongues and flanges in proper engagement. After the parts are assembled, they will be prevented from slipping relatively to eachv other either by the friction elements Within maarre the casing or by the'yoke and surrounding attachments or by a combination of both.

1With the construction disclosed, it is evident that e'ect a very strong detachable connection loy parts formed integral with I the shell and cage and at the same time maintain the over-all dimensions lWithin the limits of the usual rear integral follower so that my improved device is readily interchangeable with the integral form of shell and cage type of friction gear casings now on the market and in service.

` `In a device of the character described, the

combination with a hollow friction shell having an interior friction surface and provided With a substantially rectangular fla-nge at its inner end, of a hollow spring cage having the interior thereof, at'its end adjacent the cage, of the same form and- JOHN F. OCGNNOR. 

